She explained: "I want it to be visceral, so that is what's most important. Do I want to see teeth in placenta? No, someone else may. I don't actually want to see that, but to each his own."

The screenwriter also confessed that she wants the 'imprinting scene' where Taylor Lautner's character, Jacob Black discovers that Bella's offspring is his soul mate will also have to be carefully thought about.

Rosenberg revealed: "One must be very careful with that but hopefully you've taken this ride with Jacob for all four movies; you know Jacob, and so I think you'll experience it the way he does, which is spiritually, as a spiritual experience, as an emotional experience and not something that makes one uncomfortable."